Technology of Formula fertilization for Cotton
At present, it is the critical period of cotton preparation for cultivation and fertilization, in order to do well the formula fertilization of cotton and lay the foundation for high quality and high yield. Now the fertilization technology of cotton is provided to the majority of cotton farmers for reference:
First, pay attention to the application of farm manure: farm manure can improve soil, improve soil fertility, and contain all kinds of nutrient elements needed by crops for crop growth. it is nutritious and rich in organic matter, and plays a significant role in improving soil and improving the utilization rate of chemical fertilizer.
Second, increasing the application of phosphate fertilizer: the movement of phosphorus in the soil is small, and the dissolution and release of phosphorus is slow, so it is not easy to be absorbed by crop roots, so phosphate fertilizer should be used as base fertilizer. In production, phosphate fertilizer and mature organic fertilizer are often mixed and applied. In order to prevent phosphorus from being fixed by soil, the effect of concentrated and deep application of phosphate fertilizer is better.
Third, supplementary application of potash fertilizer: cotton absorbs about 24% of potassium from emergence to budding, 42% from budding to flowering, and 34% from flowering to maturity. Therefore, potash fertilizer should be applied on the basis or before budding to facilitate the early growth of cotton, focusing on meeting the needs of the growth and development of buds, flowers and bolls. Generally speaking, the amount of potash fertilizer is 10kg / mu and 15kg / mu.
Fourth, adjust the proportion of nitrogen: farmers apply nitrogen fertilizer for a long time, resulting in the loss and waste of nitrogen nutrients, and the serious imbalance of the proportion of nitrogen, phosphorus and potassium. According to different soil fertility, apply nitrogen fertilizer reasonably and adjust the relationship between nitrogen, phosphorus and potassium. Only in this way can we effectively give full play to the potential of fertilizer to increase production and achieve twice the result with half the effort.
Fifth, spraying boron fertilizer: sufficient boron can not only promote floral organ development, help pollination and improve seed setting rate, but also accelerate the transport of carbohydrates in the plant and increase the weight and lint percentage of single peach. Therefore, the application of 0.2 borax solution at bud stage, early flowering stage and full flowering stage can promote the robust growth of cotton to a certain extent.
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Technical essentials of cotton formula fertilization
Cotton growth is characterized by unlimited growth, regeneration ability, plant shape controllability, large fertilizer requirements. Generally speaking, adequate fertilizer is the basis for high yield and quality of cotton. Adequate phosphorus fertilizer can promote cotton plant robust growth, increase boll weight, early maturity. Potassium fertilizer is a catalyst for many enzymes in plants, which can promote photosynthesis and cellulose synthesis. Cotton fertilization technology is "nitrogen, potassium, phosphorus, boron spray" eight words formula fertilization method. Specifically, the following five technical measures should be taken. 1. Pay attention to the application of farm manure
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Seven key points of Scientific fertilization for Cotton
1. Give priority to organic fertilizer and apply sufficient base fertilizer. During soil preparation, the soil was disinfected by spraying disinfectant and 800 times solution of new high-fat film in time, and applying sufficient base fertilizer, applying 2000-3000 kg farm manure per mu to improve the ability of root system to absorb fertilizer, activate the soil, prevent consolidation and maintain the ecological balance of the rhizosphere. two。 Reduce the application of diammonium phosphate. Nitrogen, phosphorus and potassium ternary compound fertilizer should be used, or 40 kilograms of three 15 nitrogen, phosphorus and potassium compound fertilizer can be selected as base fertilizer. Cooperate with spraying when using compound fertilizer
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